光栅衍射型激光告警的探测技术研究

为了能够使近红外探测器快速获取来袭激光的二维方位角、波长,提出了一种基于FPGA架构的驱动控制技术。上位机为了能够方便、快捷的控制探测器,采用VC++编写的上位机通过USB传输到FPGA,再通过FPGA将相应的命令发送给探测器,对它的工作方式增益、带宽、积分时间进行灵活的配置；FPGA相应的控制探测器的帧频、行频以及数据配置引脚使探测器能够输出有效的数据,然后通过USB上传到VC++上位机对有效的数据进行采集显示。利用此方法对波长为850nm的激光从不同的方位角进行入射,用编写的VC++上位机成像软件进行数据采集处理,对采集到的图片进行分析,依据光斑强度确定零级、一级,推算出来袭激光方位角、波长,实验表明波长分辨率小于10nm,角度分辨率小于。

Research on the Detection Technology of Grating Diffraction Laser Warning

In order to enable the near infrared detector to obtain the azimuth and the wavelength of the incoming laser, a driving control technique based on FPGA is proposed. The host computer in order to control the detector conveniently and quickly, using PC VC++ prepared by USB transfer to FPGA, and then sends the command corresponding to the detector by FPGA, a flexible configuration of the way it works, gain bandwidth and integration time; the corresponding FPGA control frame and data line detector, pin configuration the detector can output valid data, then the effective data acquisition and display by USB upload to the VC++ host. The wavelength of 850nm laser incident from different azimuth angle by using this method, using the VC++ PC imaging software written to the data acquisition and processing, the collected images were analyzed, based on spot intensity determination of zero order, first-order, calculated attack laser azimuth angle, wave length, experiments show that the wavelength resolution of less than 10nm the angular resolution is less than 2 degrees.